20132993 has 4 divisors (see below), whose sum is σ = 20221140. Its totient is φ = 20044848.

The previous prime is 20132977. The next prime is 20132999. The reversal of 20132993 is 39923102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13897984 + 6235009 = 3728^2 + 2497^2 .

It is a cyclic number.

It is not a de Polignac number, because 20132993 - 2⁴ = 20132977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20132999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43730 + ... + 44187.

It is an arithmetic number, because the mean of its divisors is an integer number (5055285).

Almost surely, 2^20132993 is an apocalyptic number.

It is an amenable number.

20132993 is a deficient number, since it is larger than the sum of its proper divisors (88147).

20132993 is an equidigital number, since it uses as much as digits as its factorization.

20132993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88146.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 20132993 is about 4486.9803877441. The cubic root of 20132993 is about 272.0420971824.

The spelling of 20132993 in words is "twenty million, one hundred thirty-two thousand, nine hundred ninety-three".